15 Cambridge IGCSE Chemistry 0620. Syllabus for examination in 2016, 2017 and 2018.
6. Syllabus content
All candidates should be taught the Core syllabus content. Candidates who are only taught the Core syllabus content can achieve a maximum of grade C. Candidates aiming for grades A to C should be taught the
Extended syllabus content. The Extended syllabus content includes both the Core and the Supplement.
In delivering the course, teachers should aim to show the relevance of concepts to the learners’ everyday lives and to the world around them. The syllabus content has been designed so as to allow teachers
to develop lexible programmes which meet all of the general aims of the syllabus while drawing on appropriate local and international contexts.
Scientiic subjects are, by their nature, experimental. Wherever possible, learners should pursue a fully integrated course which allows them to develop their practical skills by carrying out practical work and
investigations within all of the topics listed.
1. The particulate nature of matter
Core • State the distinguishing properties of solids, liquids
and gases • Describe the structure of solids, liquids and gases in
terms of particle separation, arrangement and types of motion
• Describe changes of state in terms of melting, boiling, evaporation, freezing, condensation and sublimation
• Describe qualitatively the pressure and temperature of a gas in terms of the motion of its particles
• Show an understanding of the random motion of particles in a suspension sometimes known as
Brownian motion as evidence for the kinetic particle atoms, molecules or ions model of matter
• Describe and explain diffusion
Supplement
• Explain changes of state in terms of the kinetic theory
• Describe and explain Brownian motion in terms of random molecular
bombardment • State evidence for Brownian motion
• Describe and explain dependence of rate of diffusion on molecular mass
2. Experimental techniques
2.1 Measurement Core
• Name appropriate apparatus for the measurement
of time, temperature, mass and volume, including burettes, pipettes and measuring cylinders
16 Cambridge IGCSE Chemistry 0620. Syllabus for examination in 2016, 2017 and 2018.
2.2.1 Criteria of purity Core
• Demonstrate knowledge and understanding of paper
chromatography • Interpret simple chromatograms
• Identify substances and assess their purity from melting point and boiling point information
• Understand the importance of purity in substances in everyday life, e.g. foodstuffs and drugs
Supplement • Interpret simple chromatograms,
including the use of R
f
values • Outline how chromatography techniques
can be applied to colourless substances by exposing chromatograms to
substances called locating agents Knowledge of speciic locating agents is
not required.
2.2.2 Methods of puriication Core
• Describe and explain methods of puriication by the
use of a suitable solvent, iltration, crystallisation and distillation including use of fractionating column.
Refer to the fractional distillation of petroleum in section 14.2 and products of fermentation in
section 14.6.
• Suggest suitable puriication techniques, given information about the substances involved
3. atoms, elements and compounds
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